CN116970248B - Amphoteric polyacrylamide modified PVC drainage pipe and preparation method thereof - Google Patents
Amphoteric polyacrylamide modified PVC drainage pipe and preparation method thereof Download PDFInfo
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- CN116970248B CN116970248B CN202310783519.0A CN202310783519A CN116970248B CN 116970248 B CN116970248 B CN 116970248B CN 202310783519 A CN202310783519 A CN 202310783519A CN 116970248 B CN116970248 B CN 116970248B
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- 229920002401 polyacrylamide Polymers 0.000 title claims abstract description 86
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 78
- 150000005215 alkyl ethers Chemical class 0.000 claims abstract description 37
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 5
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 36
- -1 alkyl ether phosphate Chemical class 0.000 claims description 17
- 239000002245 particle Substances 0.000 claims description 17
- 235000010215 titanium dioxide Nutrition 0.000 claims description 16
- 239000004609 Impact Modifier Substances 0.000 claims description 15
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 15
- 229910019142 PO4 Inorganic materials 0.000 claims description 15
- 239000004698 Polyethylene Substances 0.000 claims description 15
- 235000021355 Stearic acid Nutrition 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 15
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 15
- 239000012188 paraffin wax Substances 0.000 claims description 15
- 239000010452 phosphate Substances 0.000 claims description 15
- 239000008117 stearic acid Substances 0.000 claims description 15
- 239000001993 wax Substances 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 11
- 159000000000 sodium salts Chemical class 0.000 claims description 11
- 239000011812 mixed powder Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 238000004898 kneading Methods 0.000 claims description 2
- 239000001038 titanium pigment Substances 0.000 claims 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 15
- 239000000843 powder Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 10
- 238000000746 purification Methods 0.000 abstract description 10
- 125000000524 functional group Chemical group 0.000 abstract description 8
- 239000011258 core-shell material Substances 0.000 abstract description 5
- 230000008878 coupling Effects 0.000 abstract description 4
- 238000010168 coupling process Methods 0.000 abstract description 4
- 238000005859 coupling reaction Methods 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 239000004709 Chlorinated polyethylene Substances 0.000 description 14
- IHBCFWWEZXPPLG-UHFFFAOYSA-N [Ca].[Zn] Chemical compound [Ca].[Zn] IHBCFWWEZXPPLG-UHFFFAOYSA-N 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 14
- 239000003381 stabilizer Substances 0.000 description 14
- 239000004408 titanium dioxide Substances 0.000 description 14
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 10
- 239000011575 calcium Substances 0.000 description 10
- 229910052791 calcium Inorganic materials 0.000 description 10
- 238000012986 modification Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- 239000002253 acid Substances 0.000 description 5
- 238000007599 discharging Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000002351 wastewater Substances 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 125000003368 amide group Chemical group 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 150000001346 alkyl aryl ethers Chemical group 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 150000001983 dialkylethers Chemical class 0.000 description 2
- 239000002270 dispersing agent Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical group NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 101500000959 Bacillus anthracis Protective antigen PA-20 Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/18—Applications used for pipes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an amphoteric polyacrylamide modified PVC drainage pipe and a preparation method thereof, belonging to the technical field of modified plastic materials. The invention discloses an amphoteric polyacrylamide modified PVC drainage pipe which comprises the following components in parts by weight: 100 parts of PVC resin, 10-20 parts of calcium carbonate, 1-10 parts of calcium sulfate whisker, 1-10 parts of amphoteric polyacrylamide, 1-8 parts of heat stabilizer, 1-5 parts of alkyl ether phosphate sodium salt and 2-12 parts of other auxiliary agents. The amphoteric polyacrylamide modified PVC drainage pipe is added with the alkyl ether phosphate sodium salt as a coupling carrier, so that the hydrophobicity of the calcium sulfate powder is improved, the functionality of functional groups of the calcium sulfate powder is protected, a microscopic core-shell structure is formed, and the amphoteric polyacrylamide modified PVC drainage pipe has good mechanical properties and water purification performance.
Description
Technical Field
The invention relates to the technical field of modified plastic materials, in particular to an amphoteric polyacrylamide modified PVC drainage pipe and a preparation method thereof.
Background
The building industry is rapidly developed at present, building materials are updated, and the PVC pipe has good corrosion resistance to inorganic acid, alkali and salt and is commonly used for transporting and discharging sewage and wastewater. However, the drain pipe in the building material market does not have a sewage treatment function, so that the problem of pollution to ecological environment and water resources caused by direct discharge of sewage and wastewater is solved, and the research direction is to endow a new capability to the amphoteric polyacrylamide modified PVC drain pipe so that the amphoteric polyacrylamide modified PVC drain pipe can be used for pretreatment of sewage and wastewater such as domestic wastewater, industrial wastewater and the like to relieve negative effects on fresh water resources caused by industrial development. The amphoteric polyacrylamide (ACPAM) is a white particle prepared by hydrolyzing and copolymerizing a cationic monomer, an anionic monomer and an acrylamide monomer. The branched chain of the high molecular framework is provided with carboxyl anions and vinyl cations, is an amphoteric ion irregular polymer, and can be settled under the influence of factors such as an adsorption bridge, gravity and the like by utilizing the electric neutrality principle, so that pollutants can be filtered and removed, and relatively pure water is obtained, so that the water is reasonably recycled. The amphoteric polyacrylamide is used for carrying out surface modification on the PVC resin, so that the PVC drain pipe has the capability of preliminary pretreatment of wastewater-free. However, the amphoteric polyacrylamide is extremely easy to decompose at a temperature higher than 120 ℃ in the extrusion molding process, so that the loss of functional groups is the primary problem at present. The calcium sulfate powder has good heat resistance, can isolate heat and improve the heat resistance of the amphoteric polyacrylamide modified PVC, but is generally harmful to water bodies, cannot contact underground water, a water channel or a sewage system for a long time, and is easy to generate scale and influence the water quality.
The prior art discloses a high-thermal-stability PVC film, which comprises the following raw materials in parts by weight: 65-75 parts of PVC matrix, 15-25 parts of filling dispersant, 5-10 parts of reinforcing co-agent, 1-5 parts of polyacrylamide and 5-10 parts of calcium carbonate. The PVC film with high thermal stability is mainly prepared by uniformly dispersing graphene filling dispersant to improve the thermal stability of PVC materials, obviously cannot solve the problem that the high extrusion temperature of the PVC materials damages the added functional groups of the amphoteric polyacrylamide, and has no water purification function.
Disclosure of Invention
The invention aims to overcome the defect and the defect that the high temperature of the existing amphoteric polyacrylamide modified PVC can damage the functional group of the amphoteric polyacrylamide in the extrusion process, and provides the amphoteric polyacrylamide modified PVC drainage and blow-down pipe.
The invention further aims to provide a preparation method of the amphoteric polyacrylamide modified PVC drainage pipe.
The above object of the present invention is achieved by the following technical scheme:
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 10-20 parts of calcium carbonate filler, 1-10 parts of calcium sulfate whisker, 1-10 parts of amphoteric polyacrylamide, 1-8 parts of heat stabilizer, 1-5 parts of alkyl ether phosphate sodium salt and 2-12 parts of other auxiliary agents.
The following description is needed:
The amphoteric polyacrylamide modified PVC material is added with the alkyl ether phosphate sodium salt as a coupling carrier of both calcium sulfate whiskers and amphoteric polyacrylamide, wherein the alkyl ether phosphate group of the alkyl ether phosphate sodium salt can be combined with the surface of calcium sulfate at a free H group to carry out surface modification, so that the hydrophobicity of calcium sulfate powder is improved, and in addition, the alkyl ether phosphate sodium salt can also react with the amide group of the amphoteric polyacrylamide to protect the functionality of the functional group of the amphoteric polyacrylamide. The three components form a microscopic core-shell structure with heat-resistant outer surface and functional core, so that the amphoteric polyacrylamide is still functional under the protection after high-temperature extrusion molding, and the PVC drainage pipe with the water purification effect is obtained.
In certain embodiments, preferably, the weight ratio of alkyl ether phosphate sodium salt, calcium sulfate whisker and amphoteric polyacrylamide is 1:1-2:1-2.
The alkyl ether phosphate sodium salt, the calcium sulfate whisker and the amphoteric polyacrylamide are in a specific proportion to play a synergistic effect, the alkyl ether phosphate sodium salt is added as a coupling carrier, and the free phosphate group open chain of the alkyl ether phosphate sodium salt can react and crosslink with the amide group of the amphoteric polyacrylamide in a high-temperature melting environment, so that the functional group functionality of the amphoteric polyacrylamide is wrapped and protected. Meanwhile, the calcium sulfate and the sodium alkyl ether phosphate are subjected to surface modification and uniformly dispersed in the PVC pipe, so that a microscopic core-shell structure with heat-resistant outer surface and functional core is formed.
In specific embodiments, the alkyl ether phosphate sodium salt is a mono alkyl ether phosphate sodium salt or a di alkyl ether phosphate sodium salt.
In certain specific embodiments, preferably, the calcium sulfate whisker is 80-120 mesh whisker, so that fine grinding is convenient, and the dispersibility of the calcium sulfate whisker is improved.
In certain embodiments, preferably, the thermal stability is a calcium zinc based stabilizer. The calcium-zinc stabilizer has good heat stability, light stability, transparency and tinting strength.
In a specific embodiment, the other auxiliary agents include, in parts by weight: 1 to 5 parts of lubricant, 0 to 1 part of processing aid, 0 to 5 parts of titanium white and 0 to 1 part of impact modifier.
In a specific embodiment, the lubricant is a mixture of polyethylene wax, paraffin wax and stearic acid. The lubricant is a mixture of polyethylene wax, paraffin wax and stearic acid, and can reduce friction between molecules and processing equipment in the PVC processing process, so that the fluidity of the resin is improved, and the transparency and the smoothness of the product are improved.
The impact modifier is selected from any of the core-shell polymers such as ACRs (acrylates), MBS (terpolymers of methyl methacrylate, butadiene and styrene) or CPE (chlorinated polyethylene).
In a specific embodiment, the titanium dioxide is preferably rutile. The titanium dioxide is rutile type, and has compact structure, relatively stable structure, small optical activity, high covering power and high decolorizing power, and can raise whiteness and weather resistance of pipe.
The processing aid can be selected from acrylate compounds such as LPA40, PA20 or K400P.
The invention also specifically protects a preparation method of the amphoteric polyacrylamide modified PVC drainage pipe, which is characterized by comprising the following steps:
S1, mixing and grinding alkyl ether phosphate sodium salt, amphoteric polyacrylamide and calcium sulfate according to a proportion for 2-4 hours, uniformly mixing in an aqueous solution with pH of 5-6 after grinding, and drying to obtain small particle mixed powder of the three;
S2, mixing and kneading the small particle mixed powder of the three components with other components in a hot mode, carrying out cold mixing, and finally granulating, extruding and forming to obtain the amphoteric polyacrylamide modified PVC drainage pipe.
In the specific embodiment, specific references may be referred to as follows:
Firstly, mixing alkyl ether phosphate sodium salt, amphoteric polyacrylamide and calcium sulfate according to a proportion in a grinder for grinding for 2-4 hours, then placing the mixture into a stirrer for stirring under the condition of weak acid aqueous solution (PH 5-6), stirring for 30min, and naturally airing to obtain small particle mixed powder of the three.
According to the formula, the components of the blend are mixed by a high-speed mixer (hot mixer), hot mixed to 140-145 ℃, then discharged into a low-speed mixer (cold mixer) for cooling, cold mixed to 45-55 ℃ for discharging, finally granulated in an extruder, and the obtained granules are extruded and molded.
The calcium sulfate whisker and the amphoteric polyacrylamide (ACPAM) particles are treated by alkyl ether phosphate sodium salt in the PVC pipe, and are modified and blended. At present, calcium sulfate whisker and amphoteric polyacrylamide (ACPAM) particles are added for fine grinding to obtain ACPAM particle powder and calcium sulfate whisker powder, and the ACPAM particle powder and the calcium sulfate whisker powder are stirred and modified with alkyl ether phosphate sodium salt under weak acid conditions, wherein after sodium ions of the alkyl ether phosphate sodium salt are separated under weak acid conditions, the alkyl ether phosphate sodium salt can be combined with free H radicals on the surfaces of the calcium sulfate and amphoteric polyacrylamide (ACPAM) particles for surface modification, and the hydrophobicity of the particle powder is improved. The three materials are mixed and then stirred with PVC resin in a high-speed stirrer, and the three materials are blended under the high shearing force and the high-speed mixing action of the high-speed stirrer.
The invention also specifically protects application of the amphoteric polyacrylamide modified PVC drainage pipe in transportation and discharge of sewage and wastewater.
The amphoteric polyacrylamide modified PVC drainage pipe has good pollutant filtering capability and excellent water purifying effect after being modified by the amphoteric polyacrylamide, has good heat stability, can not cause functional group destruction and calcium sulfate powder pollution in the processing process, has good water purifying property, and can be widely applied to the transportation and discharge of sewage and wastewater.
Compared with the prior art, the invention has the beneficial effects that:
According to the amphoteric polyacrylamide modified PVC drainage pipe, the alkyl ether phosphate sodium salt is added as the coupling carrier, wherein the alkyl ether phosphate sodium salt can be combined with the surface of calcium sulfate at free H groups to carry out surface modification, so that the hydrophobicity of calcium sulfate powder is improved, and in addition, the alkyl ether phosphate sodium salt can also react with the amide groups of the amphoteric polyacrylamide to protect the functionality of the functional groups of the amphoteric polyacrylamide, so that a microscopic core-shell structure is formed, and the amphoteric polyacrylamide modified PVC drainage pipe has good mechanical properties and water purification performance.
Detailed Description
The invention will be further described with reference to the following specific embodiments, but the examples are not intended to limit the invention in any way. Raw materials reagents used in the examples of the present invention are conventionally purchased raw materials reagents unless otherwise specified.
PVC resin, SG-5, xinjiang Zhongtai chemical Co., ltd.
Amphoteric polyacrylamide, guangdong first letter environmental protection materials science and technology Co.
Alkyl ether phosphate sodium salt-1, monoalkyl ether phosphate sodium salt, shanghai Min Ke New Material Co., ltd.
Alkyl ether phosphate sodium salt-2, dialkyl ether phosphate sodium salt, shanghai Min Ke New Material Co., ltd.
Calcium sulfate whisker-1, less than or equal to 80 meshes, shandong Jiayi chemical technology Co., ltd.
Calcium sulfate whisker-2, 80-120 mesh, shandong Jiayi chemical technology Co., ltd.
Calcium sulfate whisker-3, 325 mesh number, shandong Jiayi chemical technology Co., ltd.
Heavy calcium carbonate, commercially available, was used as the same material for all examples and comparative examples.
Calcium zinc stabilizer, commercially available, was the same species for all examples and comparative examples.
Processing aid LPA-40, commercially available, was the same as in all examples and comparative examples.
Paraffin wax, commercially available, was the same for all examples and comparative examples.
PE wax, commercially available, was the same for all examples and comparative examples.
Stearic acid, commercially available, was the same as in all examples and comparative examples.
Titanium dioxide, rutile, is commercially available, and all examples and comparative examples are homogeneous.
Impact modifier CPE is commercially available and all examples and comparative examples are the same.
Example 1
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 5 parts of calcium sulfate-2, 10 parts of amphoteric polyacrylamide, 2 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 5 parts of calcium-zinc stabilizer, 0.5 part of processing aid LPA and 0.5 part of impact modifier CPE.
Example 2
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 8 parts of calcium sulfate-2, 10 parts of amphoteric polyacrylamide, 2 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 5 parts of calcium-zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
Example 3
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 10 parts of calcium sulfate-2, 10 parts of amphoteric polyacrylamide, 5 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium-zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
Example 4
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 2 parts of calcium sulfate-2, 10 parts of amphoteric polyacrylamide, 5 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium-zinc stabilizer, 0.5 part of processing aid LPA and 0.5 part of impact modifier CPE.
Example 5
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 2 parts of calcium sulfate-2, 1 part of amphoteric polyacrylamide, 5 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium-zinc stabilizer, 0.5 part of processing aid LPA and 0.5 part of impact modifier CPE.
Example 6
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 10 parts of-1 calcium sulfate, 10 parts of amphoteric polyacrylamide, 5 parts of dialkyl ether phosphate sodium salt, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
Example 7
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 10 parts of calcium sulfate-1, 10 parts of amphoteric polyacrylamide, 5 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium-zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
Example 8
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 10 parts of calcium sulfate-3, 10 parts of amphoteric polyacrylamide, 5 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 8 parts of calcium-zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
The preparation method of the amphoteric polyacrylamide modified PVC drainage pipe of the above examples 1 to 8 is as follows:
s1, firstly mixing alkyl ether phosphate sodium salt, amphoteric polyacrylamide and calcium sulfate according to a proportion, grinding in a grinder for 2-4 hours, putting into a stirrer for stirring under the condition of weak acid aqueous solution (PH 5-6) after finishing grinding, and naturally airing after stirring for 30min to obtain small particle mixed powder of the three.
S2, mixing the components of the blend by a high-speed mixer (hot mixer) according to the formula, hot mixing to 140-145 ℃, then discharging into a low-speed mixer (cold mixer) for cooling, cold mixing to 45-55 ℃, discharging, granulating in an extruder, and extruding and molding the obtained granules.
Comparative example 1
100 Parts of PVC resin, 20 parts of heavy calcium carbonate, 0 part of calcium sulfate-2, 5 parts of amphoteric polyacrylamide, 0 part of alkyl ether phosphate sodium salt, 1 part of paraffin, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 5 parts of calcium zinc stabilizer, 0.5 part of processing aid LPA and 0.5 part of impact modifier CPE.
Comparative example 2
100 Parts of PVC resin, 20 parts of heavy calcium carbonate, 5 parts of calcium sulfate-2, 5 parts of amphoteric polyacrylamide, 0 part of alkyl ether phosphate sodium salt, 1 part of paraffin, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 5 parts of calcium zinc stabilizer, 0.5 part of processing aid LPA and 0.5 part of impact modifier CPE.
Comparative example 3
The amphoteric polyacrylamide modified PVC drainage pipe comprises the following components in parts by weight:
100 parts of PVC resin, 20 parts of heavy calcium carbonate, 5 parts of calcium sulfate-2, 5 parts of amphoteric polyacrylamide, 8 parts of sodium salt of monoalkyl ether phosphate, 1 part of paraffin wax, 1 part of PE wax, 1 part of stearic acid, 5 parts of titanium dioxide, 5 parts of calcium-zinc stabilizer, 40 parts of processing aid LPA and 1 part of impact modifier CPE.
The preparation method of the amphoteric polyacrylamide modified PVC drainage pipe of the comparative examples 1 to 3 is as follows:
Mixing the sodium alkyl ether phosphate, the amphoteric polyacrylamide and the calcium sulfate according to the proportion, grinding for 2-4 hours in a grinder, stirring in a stirring machine under the condition of weak acid aqueous solution (PH 5-6) after finishing grinding, stirring for 30min, and naturally airing. Obtaining the small particle mixed powder of the three.
According to the formula, the components of the blend are mixed by a high-speed mixer (hot mixer), hot mixed to 140-145 ℃, then discharged into a low-speed mixer (cold mixer) for cooling, cold mixed to 45-55 ℃ for discharging, finally granulated in an extruder, and the obtained granules are extruded and molded.
Result detection
And (3) mechanical property detection:
(1) Tensile yield strength test: GB/T1040.2-2006 determination of tensile Properties of plastics second part.
(2) Drop hammer impact test: GB/T14152-2001 thermoplastic plastic pipe external impact resistance test method is a clockwise rotation method.
(3) Longitudinal retraction rate test: GB/T6671 determination of the shrinkage of thermoplastic pipes.
And (3) detecting water purification performance:
turbidity NTU, evaporation residue mg/L, potassium permanganate consumption mg/L, lead content mg/L and cadmium content mg/L detection: safety evaluation standard of GB/T17219 drinking water conveying and distributing equipment and protective materials.
The specific detection results are shown in table 1:
as seen from table 1:
1. The addition of the sodium alkyl ether phosphate, the calcium sulfate and the amphoteric polyacrylamide can enhance the mechanical property and the water purification performance of the PVC drain pipe.
2. When the adding ratio of the sodium alkyl ether phosphate, the calcium sulfate and the amphoteric polyacrylamide is 1:2:2 in the example 3, the impact resistance, the compression resistance and the water purification performance are optimal.
Compared with examples 1-4, the comparative example 1 pipe without calcium sulfate and alkyl ether phosphate sodium salt and the comparative example 2 without alkyl ether phosphate sodium salt have larger differences in mechanical properties and water purification performance, and the synergistic mechanical properties of calcium sulfate, alkyl ether phosphate sodium salt and amphoteric polyacrylamide are high, the water purification performance is improved, and the manufactured pipe is excellent in impact resistance, bending resistance and water purification performance.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (8)
1. The amphoteric polyacrylamide modified PVC drainage pipe is characterized by comprising the following components in parts by weight:
100 parts of PVC resin, 10-20 parts of filler, 1-10 parts of calcium sulfate whisker, 1-10 parts of amphoteric polyacrylamide, 1-8 parts of heat stabilizer, 1-5 parts of alkyl ether phosphate sodium salt and 2-12 parts of other auxiliary agents,
The weight ratio of the alkyl ether phosphate sodium salt to the calcium sulfate whisker to the amphoteric polyacrylamide is 1 to 2 to 1 to 2,
The particle size of the calcium sulfate whisker is 80-120 meshes,
The preparation method of the amphoteric polyacrylamide modified PVC drainage pipe comprises the following steps:
S1, mixing and grinding alkyl ether phosphate sodium salt, amphoteric polyacrylamide and calcium sulfate according to a proportion to obtain a particle size of 1400-1600 meshes, uniformly mixing in an aqueous solution with pH value of 5-6 after grinding, and drying to obtain small particle mixed powder of the three;
S2, mixing and kneading the small particle mixed powder of the three components with other components in a hot mode, carrying out cold mixing, and finally granulating, extruding and forming to obtain the amphoteric polyacrylamide modified PVC drainage pipe.
2. The amphoteric polyacrylamide modified PVC drainage pipe according to claim 1, wherein the weight ratio of alkyl ether phosphate sodium salt, calcium sulfate whisker and amphoteric polyacrylamide is 1:2:2.
3. The amphoteric polyacrylamide modified PVC drainage pipe of claim 1 wherein the sodium salt of alkyl ether phosphate is a sodium salt of monoalkyl ether phosphate or a sodium salt of dialkyl ether phosphate.
4. The amphoteric polyacrylamide modified PVC drainage pipe according to claim 1, wherein the particle size of the calcium sulfate whisker is 80-100 mesh.
5. The amphoteric polyacrylamide modified PVC drainage pipe according to claim 1, wherein the other auxiliary agent comprises, in parts by weight: 1 to 5 parts of lubricant, 0 to 1 part of processing aid, 0 to 5 parts of titanium white and 0 to 1 part of impact modifier.
6. The ampholytic polyacrylamide-modified PVC drainage pipe of claim 5 wherein the lubricant is a mixture of polyethylene wax, paraffin wax and stearic acid.
7. The amphoteric polyacrylamide modified PVC drainage pipe of claim 5 wherein the titanium pigment is rutile or anatase.
8. The amphoteric polyacrylamide modified PVC drainage pipe of claim 7 wherein the titanium pigment is rutile.
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